I just purchased a EX-Z4, and was interested in getting an additional battery for those long vacation outings. IN my internet price searching I found then ranging from $5 to $40 plus shipping. Of course the $5 model being a "generic" battery. I did find an original Casio (NP-20) replacement battery for 19.50 plus shipping. I was just wondering if anyone has tried using a "generic" battery in their Casio? Is there any danger of messing up my new camera with a $5 battery or should I just spend the extra cash and get the Casio brand? Thanks.

I just picked up a Z4u and am testing it out. I'd just go with the $19.50 Casio replacement battery. If you spent $400 on a camera, the $20 battery is fine. Much cheaper than some proprietary batteries which are going for over $50. Send the link to me also.....I may pick one up too.